Square object over Robben Island, CPT

A friend and i went for a walk at Tygerberg Nature Reserve, being an Aviation Enthusiast i was taking several pics of the Boeings flying past and only a few minutes later realized that the object on this pic was not a cloud nor dirt on my phone’s screen. Apologies for the poor quality of images 2 and 3, both of them are screen shots where i zoomed in. Obviously i don’t know whether it was a stationary or moving object as i only spotted it later on. I took a whole lot of photo’s as the Boeing was flying past and the object only appeared in this one photo.

Hi guys
is anyone watching the light up cross on tyger hill ?
Almost directly above it is a set of lights…. stationary.
i have been watching it for almost an hour and yesterday the same lights.. Can anyone explain this perhaps or is anyone seeing this?
Its there right now!?